Specifications
Heated/Cooled Seat Schematics
Front Seat Heater Control Module Replacement
Preliminary Procedure
Driver or passenger seat replacement. Refer to Driver or Passenger Seat Replacement.
Front Seat Heater Control Module Bolt (Qty: 2)
Caution: Refer to Fastener Caution in the Preface section.
Tighten 2.5 N·m (23 lb in)
Front Seat Heater Control Module
Procedure
Disconnect the electrical connector.
Driver or Passenger Seat Back Cushion Heater Replacement
Preliminary Procedure
Front seat back cushion cover and cushion pad replacement. Refer to Front Seat Back Cushion Cover and Cushion Pad Replacement
Driver Seat Cushion Heater Replacement
Preliminary Procedure
Front seat cushion cover and pad replacement. Refer to Front Seat Cushion Cover and Pad Replacement.
Passenger Seat Cushion Heater Replacement
Preliminary Procedure
Front seat cushion cover and pad replacement. Refer to Front Seat Cushion Cover and Pad Replacement.
Front Seat Heater
Heated Seats Description and Operation
Heated Seat Components
The driver and passenger heated seats consist of the following components:
Power and Ground
Battery positive voltage is supplied at all times to the seat heating control module through a 30 A fuse located in the underhood fuse block.
This voltage is used by the module to supply power to the seat heating elements. Ground for the module is provided at G307.
Heated Seat Operation
The driver and passenger heated seats are controlled by a single seat heating control module that is located under the driver seat cushion.
Both heated seats are controlled by separate heated seat switches that are located in the HVAC control. When a heated seat switch is pressed, a serial data message is sent from the HVAC control to the HVAC control module indicating the heated seat command. The HVAC control module then serves as a gateway to transmit the message to the seat heating control module via the serial data line. In response to this signal, the seat heating control module applies battery positive voltage through the element supply voltage circuit to the appropriate seat heating elements. The seat heating control module then sends a serial data message back to the HVAC control module to gateway the information to the HVAC control to either illuminate or turn off the appropriate temperature indicator.
Temperature Regulation
When the engine ON, the heated seats will initialize in the OFF state. With each activation of the heated seat switch, the seat heating control module will cycle the temperature setting in the following manner: HIGH, MEDIUM, LOW, and OFF.
The seat heating control module monitors the seat temperature through the temperature sensor signal circuit and the temperature sensor (thermistor) that is located in the seat cushion. The temperature sensor is a variable resistor, it's resistance changes as the temperature of the seat changes. When the temperature sensor resistance indicates to the seat heating control module that the seat has reached the desired temperature, the module opens the ground path of the seat heating elements through the heated seat element control circuit. The module will then cycle the element control circuit open and closed in order to maintain the desired temperature.
Load Management
electrical power management function is designed to monitor the vehicle electrical load and determine when the battery is potentially in a high discharge condition. The heated seat system is one of the vehicle loads that is subject to reduction during a battery discharge condition. For more information on load management refer to Electrical Power Management Description and Operation.
Special Tools and Equipment
Steering Linkage Inner Tie Rod Replacement (Hydraulic Power Steering)
Special Tools
CH-6247 Removal and Installation Tool for the Steering Linkage Inner Tie Rod
For equivalent regional tools, refer to Special Tools.
Removal Procedure
Raise and support the vehicle. Refer to Lifting and Jacking the
Vehicle.
Remove the tire and wheel assembly. Refer to ...
Water Management Description and Operation
Plenum Water Flow Direction and Cleaning
A large percentage of water will flow off the windshield area into the plenum
chamber drain system and then down the outside on the
plenum to the underside of the vehicle. To ensure that the plenum chamber water
management system performs properly, the ...
Rear Side Door Replacement
Preliminary Procedure
Remove the rear side door trim panel. Refer to Rear Side Door Trim
Replacement.
Rear Side Door Check Link Bolt
Caution: Refer to Fastener Caution in the Preface section.
Procedure
Remove the water deflector
Disconnect the door electrical connector.
Suppo ...